Constellation Energy, a leading competitive energy supplier, today announced it has renewed an agreement to supply competitively priced energy to the U.S. Postal Service (USPS) in four states, helping the agency manage energy costs.

Under the 18-month contract, Constellation will supply more than 420 million kilowatt hours of electricity to the USPS in Connecticut, Pennsylvania, Illinois and Ohio. Constellation also supplies electricity to USPS offices in Maine, New York and Massachusetts.

"Constellation Energy is pleased to renew this contract and leverage our considerable energy management experience with multiple public sector organizations to help the Postal Service manage energy costs and focus resources on delivering critical services to customers," said Louis Hutchinson, Constellation vice president of Public Sector and Energy Efficiency.

Constellation Energy is the leading commercial and industrial electricity retailer in the U.S., delivering services that control costs, create budget certainty, and improve sustainability for customers. Constellation Energy also serves more than 150 federal government sites that include the U.S. Capitol and the Smithsonian Institution.

About Exelon

Exelon Corporation (NYSE:EXC) is the nation's leading competitive energy provider, with approximately $33 billion in annual revenues. Headquartered in Chicago, Exelon has operations and business activities in 47 states, the District of Columbia and Canada. Exelon is the largest competitive U.S. power generator, with approximately 35,000 megawatts of owned capacity comprising one of the nation's cleanest and lowest-cost power generation fleets. The company's Constellation business unit provides energy products and services to approximately 100,000 business and public sector customers and approximately 1 million residential customers. Exelon's utilities deliver electricity and natural gas to approximately 6.6 million customers in central Maryland (BGE), northern Illinois (ComEd) and southeastern Pennsylvania (PECO). Learn more at: www.exeloncorp.com.

Constellation Energy
Maureen Brown, 410-470-9700